| Author |
Message
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| smdavies99 |
 Posted: Thu Aug 21, 2014 2:13 am Post subject: java - no main manifest attribute |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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I have a simple bit of java code that works fine on windows but when I move it to Linux (RHEL 6.5) I get a problem.
On windows I do the following
| Code: |
"C:\Program Files (x86)\IBM\WMBT700\jdk\bin\javac" -Xlint:deprecation MQSend.java
set MQSERVER=MQTEST.SVRCONN/TCP/192.168.27.22(7000)
java -classpath C:\temp;"C:\Program Files (x86)\IBM\WebSphere MQ\Java\lib\com.ibm.mq.jar";"C:\Program Files (x86)\IBM\WebSphere MQ\Java\lib\com.ibm.mq.jmqi.jar" MQSend A.OUT MQTEST
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This as I said works fine.
So I copy the .class file to the Linux Server and create a script that looks like this.
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export MQSERVER=MQTEST.SVRCONN/TCP/'192.168.27.22(7000)'
java -classpath $HOME/Downloads/mqsend;/opt/mqm/java/lib/com.ibm.mq.jar;/opt/mqm/java/lib/com.ibm.mq.jmqi.jar MQSend A.OUT MQTEST
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Sadly it fails when run
| Code: |
no main manifest attribute, in /opt/mqm/java/lib/com.ibm.mq.jar
no main manifest attribute, in /opt/mqm/java/lib/com.ibm.mq.jmqi.jar
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The user is in the mqm group as shown below
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[mquser@localhost tmp]$ id -a
uid=501(mquser) gid=501(mqm) groups=501(mqm) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
[mquser@localhost tmp]$
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and the instance is setup as shown by the output from a dspmqinst.
| Code: |
[mquser@localhost tmp]$ dspmqinst
InstName: Installation1
InstDesc:
Identifier: 1
InstPath: /opt/mqm
Version: 7.5.0.3
Primary: Yes
State: Available
[mquser@localhost tmp]$
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There is a manifest in the .jar files so what really gives here?
What simple thing am I doing wrong?
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| fjb_saper |
| Posted: Thu Aug 21, 2014 4:26 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Your classpath is wrong. You forgot that in Unix/Linux you have to replace the windows separator ";" (semi-colon) with a ":" (full colon). 
Try it again that way and let us know...
| Code: |
export MQSERVER=MQTEST.SVRCONN/TCP/'192.168.27.22(7000)'
java -classpath $HOME/Downloads/mqsend:/opt/mqm/java/lib/com.ibm.mq.jar:/opt/mqm/java/lib/com.ibm.mq.jmqi.jar MQSend A.OUT MQTEST |
(That'll teach you about pasting a command line from windows to Unix/Linux, and just doing replace on path elements)
Your command was interpreted as trying to run the jar files and not your program... hence the error output.
Have fun. 
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| smdavies99 |
| Posted: Thu Aug 21, 2014 5:17 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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Doh! I should have realized that. (my eyes need testing obviously)
however that does not solve the problem of getting it to work although it gets a bit further as now I get the following
| Code: |
java -classpath /var/tmp:/opt/mqm/java/lib/com.ibm.mq.jar:/opt/mqm/java/lib/com.ibm.mq.jmqi.jar MQSend A.OUT MQTEST
MQSend started...
MQJE001: Completion Code '2', Reason '2495'.
WMQ exception occurred : Completion code 2 Reason code 2495
[sdavi@localhost tmp]$
[sdavi@localhost tmp]$ /opt/mqm/samp/bin/amqsgetc A.OUT MQTEST
Sample AMQSGET0 start
MQGET ended with reason code 2110
message <gello>
MQGET ended with reason code 2110
message <dfglgkg Hello World>
no more messages
Sample AMQSGET0 end
[sdavi@localhost tmp]$
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The 2110 errors with 'amqsgetc' is MQRC_FORMAT_ERROR. this means that the putting application has not set the MQMD.Format property. This is ok for the moment
so a 'C' application works but a Java one fails with an error I've never seen before. Oh the wonders of Java.
There a good few posts on the internet (and here) about this error. Many were unresolved and others point to differences between 32bit and 64 bit libraries. The Linux server has the 7.5.0.3 64bit client installed. no 32bit in sight.
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| mqjeff |
| Posted: Thu Aug 21, 2014 5:21 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| MQRC_MODULE_NOT_FOUND suggests that you are missing a jar file on the classpath, or that you're under the covers trying to use a bindings connection on a client machine. |
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| fjb_saper |
| Posted: Thu Aug 21, 2014 5:23 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Don't discount the 2495 Module not found error.
I like to add all jar files from /<mqinstall>/java/lib to the classpath. This way I do know I have no classpath problem. Specially when the jar files change from one version to the other...
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| fjb_saper |
| Posted: Thu Aug 21, 2014 5:27 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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| smdavies99 wrote: |
| Many were unresolved and others point to differences between 32bit and 64 bit libraries. The Linux server has the 7.5.0.3 64bit client installed. no 32bit in sight. |
Just for fun what is the response to:
| Code: |
which java
java -version |
You could be surprised with your comment no 32 bit in sight...
Also if using java and bindings connection, did you also set the java.library.path to the right libraries + corresponding mq library?
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| Vitor |
| Posted: Thu Aug 21, 2014 5:45 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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Also I've got 2495 module not found out of 7.5.0.3 (in my case from the IIB Toolkit) and ended up doing a setmqinst again to reset the primary installation.
No idea why I had to but theorised some weirdness with paths; the probem manifested after a mandatory corporate wide Java update to 1.7.something.
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Insanity is the best defence. |
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| smdavies99 |
| Posted: Thu Aug 21, 2014 5:48 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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| fjb_saper wrote: |
You could be surprised with your comment no 32 bit in sight...
Also if using java and bindings connection, did you also set the java.library.path to the right libraries + corresponding mq library? |
I thought that so...
| Code: |
[sdavi@localhost tmp]$ /opt/mqm/java/jre64/jre/bin/java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build pxa6460sr15-20131017_01(SR15))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 Linux amd64-64 jvmxa6460sr15-20131016_170922 (JIT enabled, AOT enabled)
J9VM - 20131016_170922
JIT - r9_20130920_46510ifx2
GC - GA24_Java6_SR15_20131016_1337_B170922)
JCL - 20131015_01
[sdavi@localhost tmp]$
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still gives the error
plus
| Code: |
[sdavi@localhost tmp]$ java -version
java version "1.7.0_65"
OpenJDK Runtime Environment (rhel-2.5.1.2.el6_5-x86_64 u65-b17)
OpenJDK 64-Bit Server VM (build 24.65-b04, mixed mode)
[sdavi@localhost tmp]$
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as used before.
If there are .jar files missing from the classpath why don't I get a java Classnotfound error?
also, why does windows only need the two .jar files to be in the classpath? Are they so different?
I will add the other com.ibm.mq.* jars to the classpath and try again.
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| mqjeff |
| Posted: Thu Aug 21, 2014 5:58 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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classpath should be classpath should be classpath regardless of platform.
MQRC_MODULE_NOT_FOUND is *suggestive* of a missing jar file, but it's also suggestive of a missing file on the library path.
Did you source setmqenv in the shell running the Java program? |
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| smdavies99 |
| Posted: Thu Aug 21, 2014 6:12 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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| mqjeff wrote: |
classpath should be classpath should be classpath regardless of platform.
MQRC_MODULE_NOT_FOUND is *suggestive* of a missing jar file, but it's also suggestive of a missing file on the library path.
Did you source setmqenv in the shell running the Java program? |
Yes.
Here is the output from a newly created command window.
| Code: |
[sdavi@localhost ~]$ set | grep MQ
MQ_DATA_PATH=/var/mqm
MQ_ENV_MODE=64
MQ_INSTALLATION_NAME=Installation1
MQ_INSTALLATION_PATH=/opt/mqm
MQ_JAVA_DATA_PATH=/var/mqm
MQ_JAVA_INSTALL_PATH=/opt/mqm/java
MQ_JAVA_LIB_PATH=/opt/mqm/java/lib64
MQ_JRE_PATH=/opt/mqm/java/jre64/jre
[sdavi@localhost ~]$
[sdavi@localhost tmp]$ ./a5
/opt/mqm/java/lib/com.ibm.mq.jar:
/opt/mqm/java/lib/com.ibm.mq.jmqi.jar:
/opt/mqm/java/lib/com.ibm.mq.axis2.jar:
/opt/mqm/java/lib/com.ibm.mq.jar:
/opt/mqm/java/lib/com.ibm.mq.jms.Nojndi.jar:
/opt/mqm/java/lib/com.ibm.mq.tools.ras.jar:
/opt/mqm/java/lib/com.ibm.mq.commonservices.jar:
/opt/mqm/java/lib/com.ibm.mq.jmqi.jar:
/opt/mqm/java/lib/com.ibm.mq.headers.jar:
/opt/mqm/java/lib/com.ibm.mqjms.jar:
/opt/mqm/java/lib/com.ibm.mq.jar
MQSend started...
MQJE001: Completion Code '2', Reason '2495'.
WMQ exception occurred : Completion code 2 Reason code 2495
[sdavi@localhost tmp]$
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The 'set | grep MQ' shows the things set by the setmqenv (contained in the .bashrc). The 'a5' script echoes the $CLASSPATH before trying to run java.
[classpath redacted for readability]
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| mqjeff |
| Posted: Thu Aug 21, 2014 6:23 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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... the arguments you're sending to look like you're asking it to make a bindings connection.
If you've only got a client installed, that would explain the MQRC_MODULE_NOT_FOUND, because it's trying to use the classes that link to native libraries for doing bindings connections, rather than trying to make a channel connection. |
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| smdavies99 |
| Posted: Thu Aug 21, 2014 6:36 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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| mqjeff wrote: |
... the arguments you're sending to look like you're asking it to make a bindings connection.
If you've only got a client installed, that would explain the MQRC_MODULE_NOT_FOUND, because it's trying to use the classes that link to native libraries for doing bindings connections, rather than trying to make a channel connection. |
in the shell script there is
| Code: |
export MQSERVER=MQTEST.SVRCONN/TCP/'192.168.27.22(7000)'
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But naturally the java code won't use that now will it!
Is there any wonder why I really [redacted] java.
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| mqjeff |
| Posted: Thu Aug 21, 2014 6:39 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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Java *might* use that, if you don't give it a queue manager name.
So
| Quote: |
| MQSend A.OUT MQTEST |
is MQTEST the qm name? Or *used* as the qm name? |
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| smdavies99 |
| Posted: Thu Aug 21, 2014 6:49 am Post subject: |
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Jedi Council
Joined: 10 Feb 2003
Posts: 6076
Location: Somewhere over the Rainbow this side of Never-never land.
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The Queue Manager name is MQTEST
The SVRCONN Channel is MQTEST.SVRCONN
It looks like I'll have to edit the code to force it to use a client connection. sigh
_________________
WMQ User since 1999
MQSI/WBI/WMB/'Thingy' User since 2002
Linux user since 1995
Every time you reinvent the wheel the more square it gets (anon). If in doubt think and investigate before you ask silly questions. |
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| mqjeff |
| Posted: Thu Aug 21, 2014 6:51 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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well, again, the behavior here should be the same on windows.
Unless MQTEST is on the windows box? |
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